Physical and chemical barriers CB5f

Which type of pathogen causes cholera?

How is cholera spread?

How is chalara ash dieback spread?

How can the spread of cholera be reduced or prevented?

How could the spread of tuberculosis be reduced or prevented?

Which term is used for organisms that spread disease from one host to another?

Which organism carries the pathogen that causes malaria from one host to another?

How does the malarial pathogen get into its host?

Which barrier to infection traps pathogens and dirt in the lungs?

Name a chemical defence against infection in the stomach.